package org.red_cross_service.mapper;

import org.apache.ibatis.annotations.Select;
import org.red_cross_service.domain.entity.VideoEntity;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;

/**
* @author zxs
* @description 针对表【rc_video】的数据库操作Mapper
* @createDate 2025-03-12 12:31:32
* @Entity org.red_cross_service.domain.Video
*/
public interface VideoMapper extends BaseMapper<VideoEntity> {

    @Select(" select sum(length) from rc_video ")
    Long sumLength();
}




